# coding=gbk
import matplotlib
import matplotlib.pyplot as plt
import numpy as np
import pandas as pd

np.random.seed(20)
input_data=np.random.randn(1000)


plt.figure(figsize=(10,10))

with plt.style.context(["classic","bmh"]):
    plt.hist(input_data, edgecolor="w", color="r",alpha=0.7)
    plt.show()